RE: Need help with RNX0301 error -- CLASSPATH or signature error

Thank you all,

Maybe this problem is something else.  I went for a really simple example, " http://www.ibm.com/support/pages/example-rpgle-program-calling-helloworld-java-program ".  This is the example:

----- Begin example
This example shows how an ILE RPG program would call a Java Program called HelloWorld.

Caution: This is an example only. IBM accepts no responsibility for its correctness.

The java code, HelloWorld.java:
class HelloWorld
{
public static void Hello ()
{
System.out.println("Hello World") ;
}
}

The ILE RPG code to call the Hello method in java class HelloWorld would be:
H DFTACTGRP(*NO)
D sayhello        PR                  EXTPROC(*JAVA
D                                     :'HelloWorld'
D                                     :'Hello')
D                                     Static
C                   callp     sayhello
C                   eval      *INLR = *ON

If the HelloWorld.class object is in IFS directory /home/abc, you must ensure the classpath environment variable is set to this directory.  This allows the JVM to find the class object.  For example:
 ADDENVVAR ENVVAR(CLASSPATH) VALUE('/home/abc') LEVEL(*JOB)
----- end example

I created the class and the RPGLE pgm as in the example.  I put the class object in /home/abc/.  I opened a fresh interactive session and set the CLASSPATH per the example.  Then I entered the command CALL PRCHELLO (the name of the RPGLE program).  I am still getting the error message

                         Additional Message Information

 Message ID . . . . . . :   RNQ0301       Severity . . . . . . . :   99
 Message type . . . . . :   Sender copy
 Date sent  . . . . . . :   10/06/24      Time sent  . . . . . . :   17:15:15

 Message . . . . :   Java exception received when calling Java method (C G D
   F).
 Cause . . . . . :   RPG procedure PRCHELLO in program BLALOCK/PRCHELLO
   received Java exception "java.lang.NoClassDefFoundError: HelloWorld" when
   calling method "Hello" with signature "()V" in class "HelloWorld".                                  Additional Message Information

 Message ID . . . . . . :   RNQ0301       Severity . . . . . . . :   99
 Message type . . . . . :   Sender copy
 Date sent  . . . . . . :   10/06/24      Time sent  . . . . . . :   17:15:15

 Message . . . . :   Java exception received when calling Java method (C G D
   F).
 Cause . . . . . :   RPG procedure PRCHELLO in program BLALOCK/PRCHELLO
   received Java exception "java.lang.NoClassDefFoundError: HelloWorld" when
   calling method "Hello" with signature "()V" in class "HelloWorld".

-----End of message.

I am at a loss.  I have done exactly what the IBM example did, down to name the IFS folder.  Still getting this error.  There are no parameters passed so it should not be a signature problem.

What do you think?






-----Original Message-----
From: JAVA400-L <java400-l-bounces-+hD5IHI5Xscn3HwCXmMcX9BPR1lH4CV8@public.gmane.org> On Behalf Of Blalock, Bill via JAVA400-L
Sent: Sunday, October 6, 2024 3:36 PM
To: Java Programming on and around the IBM i <[email protected]>
Cc: Blalock, Bill <Bill.Blalock-/[email protected]>
Subject: RE: Need help with RNX0301 error -- CLASSPATH or signature error

Hi Colin;

The Item class is in the jar.  The package name is rpgExample.

I viewed the structure of the jar by copying it to a zip file and opening the zip file.

rpzExampleJar.jar
        META-INFO
                MANIFIST.MF
        rpgExample
                GetItem.class
                GetItem.jar
                Item.class
                Item.jar
        folders for other projects in the Eclipse workspace.


-----Original Message-----
From: JAVA400-L <java400-l-bounces-+hD5IHI5Xscn3HwCXmMcX9BPR1lH4CV8@public.gmane.org> On Behalf Of Colin Williams
Sent: Sunday, October 6, 2024 1:41 PM
To: Java Programming on and around the IBM i <[email protected]>
Subject: Re: Need help with RNX0301 error -- CLASSPATH or signature error

So your code is looking for fully qualified rpgExample.Item.

Is this inside your classes folder in your jar?

On Sun, 6 Oct 2024, 17:25 Blalock, Bill via JAVA400-L, < [email protected]> wrote:

> I am trying to call Jave from RPGLESRC.  I keep running into RNX0301
> when executing the RPGLE program.  I have been at it 3 days and sure
> could use some guidance.
>
> Message . . . . :   Java exception received when calling Java method.
>  Cause . . . . . :   RPG procedure PRCPWDIRG in program BLALOCK/PRCPWDIRG
>    received Java exception
> "java.lang.NoClassDefFoundError:rpgExample.Item" when calling
>    method "<init>" with signature "()V" in class "Item".
>
> I tried for two days to get past this error with my own class and RPG.
> Yesterday I decided to see if I could make RPGLE and Java work
> together with an example from the Internet.
> https://www/.
> mysamplecode.com%2F2011%2F06%2Fcall-java-from-rpgle-explanation-with.h
> tml&data=05%7C02%7Cbill.blalock%40fisglobal.com%7C9be6398fec314522b0db
> 08dce636840b%7Ce3ff91d834c84b15a0b418910a6ac575%7C0%7C0%7C638638369036
> 954146%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJ
> BTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=dyiB4WIeuZshXfYBsbjClQN
> sW1i%2Fjjdw5WvKwNDMQ8s%3D&reserved=0
> This is a well thought out example.
>
> I wanted to eliminate coding errors in my RPGLE and Java, to minimize
> the possibility that this is a signature error. Still getting the same error.
>
> I created an Eclipse project, rpgExample.  I copied the Java source
> from the example into two files, Item.java and GetItem.java.  In
> Eclipse I exported them to the IFS as a jar file, named
> rpgExample.jar.  The destination was /iasp1/java/prcExample.  So now I
> have the jar in /iasp1/java/prcExample/rpgExample.jar.
>
> I create the RPGLE program as BLALOCK/QRPGLESRC (PRCPWDIRG).  I
> changed the package name from "com.as400samplecode" to match my
> package name of "rpgExample" in both Java and RPGLE.
>
> I used this statement at the top of the RPGLE program:
>          cmdString = 'ADDENVVAR ENVVAR(CLASSPATH) ' +
>                   'VALUE(''/iasp1/java/prcExample/rpgExample.jar'')' +
>                    'REPLACE(*YES)';
>          runCmd(cmdString);
>
> I checked the value of CLASSPATH after executing the program with
> WRKENVVAR.  The value was
>                  CLASSPATH
>  '/java/prcExample/rpgExample.jar'
> That is what I expected.  I checked the CLASSPATH with WRKLNK.  It was
> found.
>
> The execution fails with the RNX0301 error.
>
> I cannot understand what is going on.  I'd appreciate some advice.  I
> can send the source code to you.
>
> Thanks
>
>
>
>
>
>
> Bill Blalock
> Complete Payment Recovery Services
> C  (205) 292-0725
> E  [email protected]<mailto:[email protected]>
>
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